Cities of United States starting with letter O Page 29
- Ossia
- Ossian (Livingston County, New York)
- Ossipee Lake Shores
- Ossipee Mills
- Ossipee Valley
- Osso
- Osteen
- Ostella
- Ostend
- Oster
- Osterburg
- Osterholt Mobile Home Park
- Osterhout
- Ostrander (Cowlitz County)
- Ostrander (Waupaca County)
- Ostrander Mobile Home Park
- Ostrica
- Ostrom
- Ostwalt
- Oswald
- Oswald (Atchison County, Missouri)
- Oswald (Richland County)
- Oswald Park
- Oswald Place
- Oswalt
- Oswalt (Jasper County, Iowa)
- Oswegatchie
- Oswegatchie (New London County)
- Oswego (Campbell County, Tennessee)
- Oswego (Franklin County, North Carolina)
- Oswego (Holmes County, Mississippi)
- Oswego (Kosciusko County)
- Oswego (Valley County)
- Oswego Beach
- Oswego Bitter
- Oswego Center
- Oswichee
- Otay
- Oteen
- Otego (Jewell County)
- Otero
- Otes
- Otey
- Oteys Sierra Village
- Othello (Ashe County)
- Othello (Cumberland County, New Jersey)
- Othma
- Otho (Henry County, Alabama)
- Otho (Scott County)
- Otia